myVolts Ripcord 6V DC, Voltage Converter and Adapter Cable, Supplies synthesizers, effect devices, MIDI equipment and numerous other devices with power via USB port, power bank or USB power supply, 6 V DC, 1.5 A (1500 mA), Polarity: Centre positive, Output: 5.5 mm barrel connector, 2.1 - 2.5 mm inside, Input: USB-A, Cable length: 145 cm@+*Suitable for:*@+@+, Akai MPK 225, Akai MPK 249, Akai MPK 261, Akai MPK 88, Akai MPD26, and more